Prionting machine



March 16 1926.

J. KRELL PRINTING MACHINE Filed FebJlS. 1923 2 Sheets-She et 1 Patented Mar. 16, 1926.

1,576,517 PATENT OFFICE.

JOSEPH KRELL, O1 BERLIN-PANKOW, GERMANY.

PRINTING macnmn.

Application filed February 13, 1923. Serial No. 618,828.

To aZZ whom. i may concern:

Be it known that I, JOSEPH KRELL, residing at 16 Breitestrasse, B'erlin-Pankow, Germany, have invented certain new and useful Improvements in Prlntlng Machmes, of

which the following is a specification.

This invention relates to printing or addressing machines and more particularly'to machines of the kind described in U. S. Patent No. 1,532,890 in which printing plates are moved in succession into a printing position and during their movement control an impression device so as to cause any de sired printing plates to pass on without pro ducing an impression on the paper band. In this known machine blank spaces are left on the paper whenever a printing plate is prevented from producing its impression and the object of the present invention is to prevent the occurrence of such blank spaces. This object is accomplished by providing a feed mechanism that only shifts on the paper or list whenever a printing plate has actually produced an impression. To this end the driving rod that actuates the automatic feed mechanism is not directly connected as hitherto to the movable impression lever, but intermediate links are arranged between. the impression lever and the said driving rod or thrust-rod, and these intermediate links are controlledby the levers that move the impression pad into its operas tive position in such a manner that feed motion is imparted to the paper feed mechanism not at each actuationof the impression lever, but only Whenever the impression pad is moved intoits operative position during the actuation of the impression lever, i. e.,

only when the impression pad causes a printing plate to make its impression on the paper band or list,

As the movements of the rod for driving the paper feed mechanism can only be adjusted within narrow limits by means of the parts mounted on the impression lever, further means are provided in accordance with the invention which enable the motions of the driving rod to be increased so as to obtain practically any desired spacing between successive impressions on the paper band or list. Other features of the invention will appear hereinafter in the specification and claims.

The drawing illustrates the parts of an addressing machine according to the invention which are deemed nepessary for he un dcrstanding of the same, the other parts being omitted.

Fig. 1 is a sectional elevation of a machine in its normal position,

Fig. 2 a plan view, and 1 Figs. 3 and 4 are sectional elevations corresponding to Fig. 1, the impression lever in both of these figures being shown in its lowered position, and Fig. 3 showing the position of the lever when a printing plate is skipped over, while Fig. 4 shows the position of the lever when the printing plate makes an impression on the paper.

Figs. 5 and 6 are elevations of details.

The general features of the novel addressing machine are similar to those of the machine described in the U. S. application referred to above. The machine comprises a table a with a raceway a in which the printing plates 1) travel. The impression lever 2 is shaped in the form of an elbow and has a two-armed lever z pivo-tally mounted upon it. There is a frictional engagement at the pivot 1 between the lever a and the impression lever so vthat when the latter is swung round the lever 2 participates in the swinging movement, unless prevented from doing so by a catch as will be presentlydescribed. The lower end of the two-armed lever z cooperates with a hook or catch a forming the end of a two-part lever a, s loaded at the opposite end by a Weight 25. \Vhenover a printing plate is to be caused to make an impression on the paper band fed through the machine an electro-Inagnet n is energized and this results in the rising of the catch u and in its engaging with the bottom end of the lever 2 as shown in Fig. at.

Linked to the upper end of the lever 2 is a set of levers 3, 4, 5, 6, 7, the lever 4, 5 being pivoted at 8 on the impression lever 2. The top end of the lever 7 is connected to a shaft 9 ournalled in the head of the impression lever. A cam 15 may be mounted on, or associated with, the shaft 9, and this cam may be adapted to push the impression pad 16 downwardly from the head of the impression lever, the extent to which the pad 16 is moved away from, or out of, the head depending on the position into which the shaft 9 is turned. An impression will be made on the paper by theprinting plate bill the "printing position only when the impression pad has been moved out of the position shown 1n Fig. 1 into the position shown in Fig. 4 as a result of the rotation of the roll 15 or cam in the headof the impression lever 2. This impression pad has been de scribed and claimed per se in U. S. Patent 1,436,981.

A feature of the invention comprises a two-armed lever 18, 19 pivoted at 17 to the impression lever 2. The upper arm 18 of the lever is connected by a di'aftrod 20 with the upper end of the lever Linked to the lower arm 19 is a thrust-rod 21 whose other end is connected to the step-by-step list shifting device or feed inechanisi'ii for the purpose of actuating the same. To enable .the points of engagement between the rods 20, 21 and the lever 18 to be shifted more or less from the center of rotation 17 the shafts of the bolts of the rods 20, 21 are arranged in slots in the lever 18 so that they can be fixed at various distances from the pivot 17.

The device for shifting the printed list or paper band 22 across the path or raceway of the printing plate 6 and over the printing plates consists of two side rails 23, 2-1 fixed at a certain distance apart and between which a guide plate 25 is adapted to slide. The guide rail 24 is channelled in the direction of its length toreceive a rack or ratchet bar 26 adapted to reciprocate in the channelled rail 24 and provided with a bracket 27 which protrudes through an opening in the bottom of the guide rail 24. Attached to this bracket 27 is 'a short drawrod 28 pivoted to the triangular lever 29 which in turn is pivoted on a bolt 30 carried by a bracket 31 that is fixed to the guide rail 24. The rocker arm 29 is linked to the end'of the thrust-rod 21 whose head 32 can be attached at various distances from the. pivot 30 by means of the holes 33 in the rocker plate 29. When the thrust-rod 21 is moved in the direction of the arrow 34 the rocker plate 29 is swung in the direction of the arrow 35, this resulting in a displacement of the ratchet. bar 26 in the direction of the arrow 36. \Vhen the rod 21 is moved in the opposite direction the -ratcliet bar 26 is displaced in the direction pposite to that indicated by the arrow 36. 'lhe'extent. of each movement of the ratchet bar 26 will be different according to the point at which the thrust-rod 21 is attached to the rocker plate 29, the same amount of travel of the rod 21 producing a greater displacement of the bar 26 the i'icarei. its point of attachment isto the pivot 30.

Above the ratchet bar. 26 is a detent 87 mounted on the guide plate This dcteut is pivoted on a bracket 38 and kept pressed downward into the teeth of the ratchet bar 26 by a leaf spring 39. Therefore, whenever the ratchet bar 26 is shifted in the direction of the arrow 36, the guide plate 25 is carried along to the same extent in the direction of the arrow 86, while movements of the ratchet bar in the opposite direction do not at est he guide plate becau e the ratchet bar slips past the detent 3T lifting it out of each tooth and leaving the guide plate 25 in the position into which it had been moved by the forward stroke of the bar 26. Also mounted on the guide plate 25 is a clamping device 40 adapted to seize the end of the paper-band 22 on which the list is to be printed, so that, at each movement of the guide plate 25 in the direction of the arrow 36, the list is fed forward to a corresponding extent, this resulting in the list 22 being fed forward so as to present a clear space for the impression of the next printing plate.

The operations of the addressing machine that fall in the scope of this invention will now be described. At each actuation of the machine the impression lever 2 is moved from the position shown in Fig. 1 downwards into the position shown in Fig. 3. As long as no impression is to be produced on the paper band by the printing plates travel; ling through the machine, the lever a remains in its normal position relatively to the impression lever 2 as shown in Fig. 3. Therefore the two-armed lever 18, 19 only executes very slight swinging movements that are transmitted to the thrust rod 21 and through this latter to the rocker plate 29. These reciprocations of the thrust rod, in consequence of the arrangement of the parts cooperating with it, are so slight that the ratchet bar 26 is shifted in the direction of the arrow 36 and the opposite direction through a distance which is smaller than the breadth of a ratchet bar tooth so that no feed motion of the guide plate 25 takes place.

Butif, in consequence of the energization of the electroinagiiet n, the printing plate that has been shifted into the printing po sition, as described in the aforesaid prior application, is to be caused to print an impression on the paper band the lever 2 will be seized by the catch uas shown in Fig. 4 and this results in the impression pad 16 bei.ng nim'ed outwardly from the head of the impression lever so as to give rise to an impression on the paper. The locking of the lever .2 in the position shown in Fig. 4, when the impression lever 2 is swung down, re- 1 sults in the lever l 8, 19 being turned i'elatively to the impression lever 2 so that, when the impression lever and the rocker plate 20 is 1 2 reaches its lowest; position, the lever 18, 1.) will have gone iii- "to the position shown in Fig. 1. This reratchet bar is displaced in the opposite direction to the arrow 36. If the amount of motion imparted to the ratchet bar 26 is to be increased, it is only necessary to shift the point of engagement 32 of the thrust-rod 21 nearer to the pivot 30 of the rocker plate 29. \Vhen after the printing plate has printed an impression and after the ratchet bar 26,has been shifted in the opposite direction to the arrow 36 through a distance of at least one tooth, the impression lever returns from the position shown in 'Fig. 4 into the position shown in Fig. 1, the thrust rod 21 is also moved back into its initial position, because the lever 2 will have been released during the return movement of the impression lever in the manner described in the aforesaid application and will again rotate with the impression lever 2 round the pivot 1. This return motion of the thrust rod 21 in the direction of the arrow 34 results in the ratchet bar 26 also moving back in the direction of the arrow 36 and during this movement the pawl 37 imparts a feed motion to the guide plate 25 and to the paper band or list 22, the extent of this feed motion corresponding to the distance between two impressions 'on the paper. The spaces between the impressions will therefore all be equal, the list or paper band remaining stationary or having no feed motion imparted to it whenever the impression lever 2 is lowered without the printing plate producinc an impression on the paper.

I claim:

1. In amachine of the kind described, a printing plate, an impression pad, means for feeding paper between said plate and said pad, auxiliary means for completing the printing movement upon a partial printing movement of said plate and said pad, and means controlled in conjunction with said last named means for actuating said feeding means.

2. In a machine of the kind described. a printing plate, an impression pad, means for feeding paper between said plate and said pad, auxiliary means for completing the movement and performing a printing action upon a partial movement of the pad toward said plate. and means controlled in conjunction with said auxiliary means for actuating said feeding means.

3. In a machine of the kind described, a printing plate, an impression member, means for feeding paper between said plate and said member, an impression pad on said impression member and movable relative thereto, and means for actuating said feeding means on a relative movement between said pad and said impression member.

at. In a machine of the kind described, a printing'member, an impression member for cooperating therewith, means for feeding paper between said members, Oii of said members being adapted to execute a normally incomplete printing movement, auxiliary means for complet ng such a movement and means controlled in conjunction with said auxiliary means for actuating said feeding means.

In a device of the kind described, a printing plate, an impression lever, an impression pad on said impression lever and adapted to be moved relative thereto, a lever pivoted on said impression lever and adapted to move therewitlf, connecting mechanism between said pivoted lever and said impression pad, means for arresting said pivoted lever during a movement of the impression lever whereby said impression pad is moved relative to the impression lever, and paper feeding means operated upon said relative movement.

6. In a device of the kind described, a printing plate, an impression lever, an impression pad on said impression lever and adapted to be moved relative thereto, a lever pivoted on said impression lever, means whereby on a relative movement between said pivoted lever said impression lever said impression pad is moved relative to said impression lever, and paper feeding means operated upon said relative movement.

-7. In a device of the kind described, a printing? plate, an impression lever, an impression pad on said impression lever and adapted to be moved relative thereto, means for feeding paper between said plate and said pad, a lever pivoted on said impres- SlOIl lever and adapted to movetherewith.

connecting means between said pivoted lever, said impression pad, and said feeding: means, and means for arrestingsaid pivoted lever during a movement of said impression lever whereby said impression pad and said 'feedinp; device are actuated.

8. In a machine of the kind described, the combination of printing plates, a paper feed device for shifting paper across the printing plates, a movable impression lever, an impression pad carried by the impression lever and movable relatively thereto and adapted when thus relatively moved to press the paper against a printing plate, an impression pad actuating mechanism associated with the impression lever, and a link between the impression pad actuating mechanism and the pa per feed device whereby the latter is actuated only upon actuation of the impression pa'd.

9. In a machine of the kind described, the combination of printing plates, a paper feed devicefor shifting paper across the printing plates, amovable impression lever, an impression pad carried by the impression lever and movable relatively thereto and adapted when thus relatively moved to press the paper against a printing plate, a pivoted lever in frictional engagement with the imp'ression lever and adapted to participate in it's movements, means for arresting the pivoted lever while the impression lever is moved, an impression pad mover, links mounted on the impression lever and connecting the said pivoted lever to the impression pad mover and adapted to operate the latter when the pivoted lever is arrested, a two-armed lever pivoted on the impression lever and having a long arm and a short arm, a 'draw-rod connecting the long arm to the pivoted lever, and a thrust-rod connecting the short arm to the paper feed device, the said arms being adapted to transmit a feed motion through the thrust-rod to the feed device whenever the impression lever is moved and the pivoted arm is arrested.

10. In a machine of the kind described, the combination of printing plates, a paper feed device for shifting paper across the printing plates, a movable impression lever, an impression pad carried by the impression lever and movable relatively thereto and adapted when thus relatively moved to press the paper against a printing plate, a pivoted lever in frictional engagement with the im pression lever and adapted to participate in its movements, means for arresting the pivoted lever while the impression lever is moved, an impression pad mover, links mounted on the impression lever and connecting the said pivoted lever to the impression pad mover and adapted to operate the latter when the pivoted lever is arrested, a two-armed lever pivoted on the impression lever and having a long arm and a short arm, a draw-rod connecting the long arm to the pivoted lever, a pivoted rocker arm with points of connection at various distances from its pivot, a link between said poi nt. of connection and a paper feed device and a thrust-rod connecting the said short arm to the rocker arm, the said long and short arms being adapted to transmit a feed motion through the thrust-rod, rocker arm and link to the paper feed device whenever the impression lever is moved and the pivoted arm is arrested, and the extent of the feed motion depending on What said point of connection the said link is connected to.

11. In a machine of the kind described, the combination of printing plates, a paper feed device for shifting paper across the printing plates, a ratchet bar for actuating the paper feed device, a movable impression lever, an impression pad carried by the impression lever and movable relatively thereto and adapted when thus relatively moved to press the paper against a printing plate, a pivoted lever in frictional engagement with the impression lever and adapted to participate in its movements, means for arresting the pivoted lever while the impression lever is moved, an impression pad mover, links mounted on the impression lever and connecting the said pivoted lever to the impression pad mover and adapted to operate the latter when the pivoted lever is arrested, a two-armed lever pivoted on the impression lever and having a long arm and a short arm. a draw-rod connecting the long arm to the pivoted lever, a pivoted rocker arm with points of connection at various distances from its pivot, a link between said point of connection and the said ratchet bar, and a thrust rod connecting the said short arm to the rocker arm, the said long and short arms being adapted to transmit a feed motion through the thrust rod, rocker arm, link and ratchet bar to the paper feed device whenever the impression lever is moved and the pivoted arm is arrested, and the extent of the feed motion depending on What said point of connection the said link is connected to.

In testimony whereof I aflix my signature.

' JOSEPH KRELL. 

